package cn.tedu.ivos.application.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.dto.ApplicationQuery;
import cn.tedu.ivos.application.pojo.dto.ApplicationSaveParam;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.application.pojo.vo.ApplicationVO;
import cn.tedu.ivos.application.service.ApplicationService;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import cn.tedu.ivos.vehicle.mapper.VehicleMapper;
import cn.tedu.ivos.vehicle.pojo.entity.Vehicle;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

@Slf4j
@Transactional
@Service
public class ApplicationServiceImpl implements ApplicationService {
    @Autowired
    ApplicationMapper applicationMapper;
    @Autowired
    AuditService auditService;
    @Autowired
    UserMapper userMapper;
    @Autowired
    AuditMapper auditMapper;
    @Autowired
    VehicleMapper vehicleMapper;

    @Override
    public void save(ApplicationSaveParam applicationSaveParam) {
        log.debug("新增申请单业务:参数={}", applicationSaveParam);
        Application application = new Application();
        BeanUtils.copyProperties(applicationSaveParam, application);
        //设置当前新增的申请单的初始状态为"已发起"
        application.setStatus(ApplicationStatusEnum.PENDING.getCode());
        application.setCreateTime(new Date());

        /* 遇到了问题:新增申请单时,对应审批单数据中没有当前申请单的id
         * 原因:传给审批的申请单对象application的id属性没有值
         * 解决方案：给此方法对应的SQL上加  useGeneratedKeys="true" keyProperty="id"
         * 作用:JDBC会为当前的application对象自动生成自增主键
         * 并且把生成的主键值赋值给当前application对象的id属性
         * */
        applicationMapper.insert(application);
        //还需要为此申请单生成对应的审批单数据
        auditService.insertAudit(application);
    }

    @Override
    public List<ApplicationVO> selectApplication(ApplicationQuery applicationQuery) {
        log.debug("查询申请单业务:参数={}", applicationQuery);
        List<ApplicationVO> list = applicationMapper.selectApplication(applicationQuery);
        //遍历每一个查询出来的申请单对象,依次为每个申请单补充审批人数据
        for (int i = 0; i < list.size(); i++) {
            ApplicationVO applicationVO = list.get(i);
            //处理当前遍历到的申请单,给它补充审批人数据
            assignAuditUserList(applicationVO);
        }
        return list;
    }

    @Override
    public void cancel(Long id) {
        log.debug("撤销申请业务:参数={}", id);
        Application application = new Application();
        application.setId(id);
        //撤销需要将申请单的状态改为"撤销"
        application.setStatus(ApplicationStatusEnum.CANCEL.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        //还需要在此撤销申请的业务处理方法中,调用删除对应审批单的方法
        //注意:此处是删除指定申请单对应的审批单数据,这里的id是申请单id
        auditMapper.deleteByApplicationId(id);
    }

    @Override
    public void distribute(Long applicationId, Long vehicleId) {
        log.debug("分配车辆业务:参数={},{}", applicationId, vehicleId);
        Application application = new Application();
        application.setId(applicationId);
        application.setVehicleId(vehicleId);
        application.setStatus(ApplicationStatusEnum.ALLOCATION.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);
        vehicle.setStatus("2");
        vehicle.setUpdateTime(new Date());
        vehicleMapper.update(vehicle);
    }

    @Override
    public void back(Long applicationId, Long vehicleId) {
        log.debug("车辆退回业务:参数={},{}", applicationId, vehicleId);
        Application application = new Application();
        application.setId(applicationId);
        application.setVehicleId(null);
        application.setStatus(ApplicationStatusEnum.END.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.back(application);

        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);
        vehicle.setStatus("1");
        vehicle.setUpdateTime(new Date());
        vehicleMapper.update(vehicle);
    }

    private void assignAuditUserList(ApplicationVO applicationVO) {
        //1.准备空集合,用来保存申请单对应的审批人姓名与id数据
        List<String> auditUsernameList = new ArrayList<>();
        List<Long> auditUserIdList = new ArrayList<>();
        //2.根据传入的申请单参数,获取当前申请单的id,查询此申请单对应的审批单数据
        //注意:此处查出的审批单可能有多条
        List<AuditVO> auditVOList = auditService.selectAuditByApplicationId(applicationVO.getId());
        //3.依次遍历每一个审批单对象
        for (int i = 0; i < auditVOList.size(); i++) {
            AuditVO auditVO = auditVOList.get(i);
            //4.取出当前审批单对象中的审批人id
            Long id = auditVO.getAuditUserId();
            auditUserIdList.add(id);
            //5.根据审批人id到用户模块查询此审批人的姓名,并装入上方的空集合中
            UserVO userVO = userMapper.selectById(id);
            auditUsernameList.add(userVO.getUsername());
        }
        //6.准备一个拼接工具,帮我们将所有审批人姓名连成一个字符串
        StringJoiner stringJoiner = new StringJoiner(",");
        for (String username : auditUsernameList) {
            stringJoiner.add(username);
        }
        //将拼接好的姓名字符串赋值给传入的申请单对象的属性:
        //String auditUsernameList
        applicationVO.setAuditUsernameList(stringJoiner.toString());
        //将准备好的审批人id集合赋值给传入的申请单对象的属性:
        //List<Long> auditUserIdList;//[106,103]
        applicationVO.setAuditUserIdList(auditUserIdList);
    }
}








